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# Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.
import("../build/dart/dart_action.gni")
import("../runtime/runtime_args.gni")
import("../sdk_args.gni")
_dart_root = get_path_info("..", "abspath")
declare_args() {
# Default to building app-jit snapshots. The simulator and cross builds
# override this to script snapshots to cut down on build time.
if (dart_target_arch == target_cpu && target_cpu == host_cpu) {
dart_snapshot_kind = "app-jit"
} else {
dart_snapshot_kind = "kernel"
}
}
# Creates an app-jit snapshot for a Dart program based on a training run.
#
# Parameters:
# main_dart (required):
# The entrypoint to the Dart application.
#
# training_args (required):
# Arguments to pass to the Dart application for the training run.
#
# training_deps (optional):
# Deps needed for the training run.
#
# training_inputs (optional):
# Inputs needed for the training run.
#
# vm_args (optional):
# Additional arguments to the Dart VM.
#
# name (optional):
# The name of the snapshot if different from the target name. The output
# will be in $root_gen_dir/$name.dart.snapshot.
#
# extra_deps (optional):
# Any additional build dependencies.
#
# extra_inputs (optional):
# Any extra build inputs.
#
# dot_packages (optional):
# The .packages file for the app. Defaults to the $_dart_root/.packages.
#
# output (optional):
# Overrides the full output path.
template("application_snapshot") {
assert(defined(invoker.main_dart), "Must specify 'main_dart'")
assert(defined(invoker.training_args), "Must specify 'training_args'")
if (defined(invoker.dart_snapshot_kind)) {
dart_snapshot_kind = invoker.dart_snapshot_kind
}
snapshot_vm_args = []
if (defined(invoker.vm_args)) {
snapshot_vm_args = invoker.vm_args
}
# If --coverage=true/false hasn't been explicitly specified,
# add --coverage=false.
has_coverage_setting = false
foreach(vm_arg, snapshot_vm_args) {
vm_arg_split = string_split(vm_arg, "=")
if (vm_arg_split[0] == "--coverage") {
has_coverage_setting = true
}
}
if (!has_coverage_setting) {
# Also add --ignore-unrecognized-flags because --coverage is unrecognized
# in product mode.
snapshot_vm_args += [
"--coverage=false",
"--ignore-unrecognized-flags",
]
}
main_dart = invoker.main_dart
training_args = invoker.training_args
training_deps = []
if (defined(invoker.training_deps)) {
training_deps += invoker.training_deps
}
training_inputs = []
if (defined(invoker.training_inputs)) {
training_inputs += invoker.training_inputs
}
name = target_name
if (defined(invoker.name)) {
name = invoker.name
}
extra_deps = []
if (defined(invoker.deps)) {
extra_deps += invoker.deps
}
extra_inputs = [ main_dart ]
if (defined(invoker.inputs)) {
extra_inputs += invoker.inputs
}
if (defined(invoker.dot_packages)) {
dot_packages = invoker.dot_packages
} else {
dot_packages = rebase_path("$_dart_root/.dart_tool/package_config.json")
}
output = "$root_gen_dir/$name.dart.snapshot"
if (defined(invoker.output)) {
output = invoker.output
}
gen_kernel_args = []
if (defined(invoker.gen_kernel_args)) {
gen_kernel_args += invoker.gen_kernel_args
}
# Build the kernel file using the prebuilt VM to speed up the debug and
# simulator builds.
prebuilt_dart_action(target_name + "_dill") {
if (defined(invoker.pool)) {
pool = invoker.pool
}
deps = extra_deps + [
"$_dart_root/runtime/vm:kernel_platform_files($host_toolchain)",
"$_dart_root/runtime/vm:vm_platform",
"$_dart_root/utils/gen_kernel:bootstrap_gen_kernel",
]
gen_kernel_kernel =
get_label_info("$_dart_root/utils/gen_kernel:bootstrap_gen_kernel",
"target_gen_dir") + "/bootstrap_gen_kernel.dill"
platform_dill = "$root_out_dir/vm_platform_strong.dill"
inputs = extra_inputs + [
gen_kernel_kernel,
platform_dill,
main_dart,
dot_packages,
]
output = "$target_gen_dir/$name.dart.dill"
outputs = [ output ]
depfile = "$output.d"
vm_args = [
# Ensure gen_kernel.dart will use this SDK hash when consuming/producing kernel.
"-Dsdk_hash=$sdk_hash",
]
script = gen_kernel_kernel
is_product_flag = dart_runtime_mode == "release"
args = [
"--packages=" + rebase_path(dot_packages, root_build_dir),
"--platform=" + rebase_path(platform_dill, root_build_dir),
"--no-aot",
"--no-embed-sources",
"--no-link-platform",
"--output=" + rebase_path(output, root_build_dir),
"--depfile=" + rebase_path(depfile, root_build_dir),
# Ensure the compiled application (e.g. kernel-service, frontend-server,
# ...) will use this SDK hash when consuming/producing kernel.
#
# (Instead of ensuring every user of the "application_snapshot" /
# "kernel_snapshot" passes this if needed, we always pass it)
"-Dsdk_hash=$sdk_hash",
"-Ddart.vm.product=$is_product_flag",
]
args += gen_kernel_args
args += [ rebase_path(main_dart, root_build_dir) ]
}
# Create a snapshot from kernel built above.
if (dart_snapshot_kind == "kernel") {
copy(target_name) {
deps = extra_deps + [ ":${target_name}_dill" ]
sources = [ "$target_gen_dir/$name.dart.dill" ]
outputs = [ output ]
assert(snapshot_vm_args != "", "Ignoring unused argument")
assert(training_args != "", "Ignoring unused argument")
assert(training_inputs != "", "Ignoring unused argument")
assert(training_deps != "", "Ignoring unused argument")
}
} else {
dart_action(target_name) {
if (defined(invoker.pool)) {
pool = invoker.pool
}
deps = extra_deps + [ ":${target_name}_dill" ] + training_deps
depfile = "$output.d"
script = "$target_gen_dir/$name.dart.dill"
inputs = extra_inputs + training_inputs
outputs = [ output ]
# Explicitly set DFE so Dart doesn't implicitly depend on the kernel service
# snapshot (creating a circular dep. for kernel-service_snapshot).
dfe = "NEVER_LOADED"
vm_args = [
"--deterministic",
"--packages=" + rebase_path(dot_packages, root_build_dir),
"--snapshot=" + rebase_path(output, root_build_dir),
"--snapshot-depfile=" + rebase_path(depfile, root_build_dir),
] + snapshot_vm_args
if (dart_snapshot_kind == "app-jit") {
vm_args += [ "--snapshot-kind=app-jit" ]
args = training_args
} else {
assert(false, "Bad dart_snapshot_kind: $dart_snapshot_kind")
}
}
}
}